\begin{figure}[!htb]
\begin{center}
\begin{tikzpicture}
[
	xscale	= 1,	% to scale horizontally everything but the text
	yscale	= 1,	% to scale vertically everything but the text
]



\node {root}
child
{
	node {left}
}
child
{
	node {right}
	child
	{
		node {child 1}
	}
	child
	{
		node {child 2}
	}
};



\end{tikzpicture}
%
\caption{Simple example of a tree.}
\label{fig:trees__simple_example}
%
\end{center}
\end{figure}

